| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Swan Creek | city | Illinois | United States | 40.66778 | -90.65472 | 767 | 666 |
| Swansea | city | Illinois | United States | 38.53389 | -89.98889 | 541 | 66618 |
| Swanwick | city | Illinois | United States | 38.16972 | -89.53611 | 564 | 968 |
| Swede Town subdivision | city | Illinois | United States | 41.89278 | -87.63972 | 583 | 545099 |
| Swedentown subdivision | city | Illinois | United States | 41.96528 | -87.68333 | 610 | 671341 |
| Swedona | city | Illinois | United States | 41.27917 | -90.44472 | 698 | 1764 |
| Sweet Home historical | city | Illinois | United States | 42.46639 | -90.04583 | 935 | 1095 |
| Sweet Water | city | Illinois | United States | 40.05389 | -89.69389 | 600 | 1540 |
| Swift | city | Illinois | United States | 41.92028 | -88.04222 | 721 | 137943 |
| Swygert | city | Illinois | United States | 40.91167 | -88.52944 | 711 | 1382 |
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